|Election year|# of constituency votes|% of constituency votes|+/–|# of party list votes|% of party list votes|+/–|# of overall seats won|
|---|---|---|---|---|---|---|---|
|1965|587,216|1.8|1.8|664,193|2.0|2.0|0 / 518|
|1969|1,189,375|3.6|1.8|1,422,010|4.3|2.3|0 / 518|
|1972|194,389|0.5|3.1|207,465|0.6|3.7|0 / 518|
|1976|136.023|0.4|0.1|122,661|0.3|0.3|0 / 518|
|1980||||68,096|0.2|0.1|0 / 497|
|1983|57,112|0.1|0.3|91,095|0.2|0|0 / 498|
|1987|182,880|0.5|0.4|227,054|0.6|0.4|0 / 497|
|1990|190,105|0.4|0.1|145,776|0.3|0.3|0 / 662|
|1998|45,043|0.1|0.3|126,571|0.3|0|0 / 669|
|2002|103,209|0.1|0.1|215,232|0.4|0.1|0 / 603|
|2005|857.777|1.8|1.6|748,568|1.6|1.2|0 / 614|
|2009|768,442|1.8|0|635,525|1.5|0.1|0 / 620|
|2013|634,842|1.5|0.3|560,660|1.3|0.2|0 / 630|

Question: in the year ____, no constituency data was available.
Answer: 1980